Maybe try:
Filter Device - Simple Displacement
Available in all Editions
The Displacement device acts horizontally on the heightfield to push around or smear pixels. There are multiple names for this operation; you will see it commonly called Distortion, Warping, or Displacement; they are all names for the same thing. Displacement can produce some wild looking terrain; rock can seem to be pulled like taffy or be bowed and wavy. The kind of effect that the Displacement device produces is highly dependant on the features of the terrain connected to the second input.